For purposes of this part, the following definitions apply:

(a) Complaint means a filing challenging an existing rate or practice under section 13(1) of the Interstate Commerce Act.

(b) Protest means a filing, under section 15(7) of the Interstate Commerce Act, challenging a tariff publication.

[Order 561, 58 FR 58780, Nov. 4, 1993, as amended by Order 578, 60 FR 19505, Apr. 19, 1995]